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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: ContextMainClass.html 689 2013-06-28 19:22:16Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.main;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import org.springframework.context.support.ClassPathXmlApplicationContext;<a name="line.10"></a>
<span class="sourceLineNo">011</span><a name="line.11"></a>
<span class="sourceLineNo">012</span>/**<a name="line.12"></a>
<span class="sourceLineNo">013</span> * Support superclass for {@link MainClass} implementations that wish to execute<a name="line.13"></a>
<span class="sourceLineNo">014</span> * with an associated Spring application context.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span>public abstract class ContextMainClass extends MainClass {<a name="line.16"></a>
<span class="sourceLineNo">017</span><a name="line.17"></a>
<span class="sourceLineNo">018</span>    protected ClassPathXmlApplicationContext context;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>    private void openContext() {<a name="line.20"></a>
<span class="sourceLineNo">021</span>        String path = getContextLocation();<a name="line.21"></a>
<span class="sourceLineNo">022</span>        this.log.info("opening application context " + path);<a name="line.22"></a>
<span class="sourceLineNo">023</span>        this.context = new ClassPathXmlApplicationContext(path, getClass());<a name="line.23"></a>
<span class="sourceLineNo">024</span>    }<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>    private void closeContext() {<a name="line.26"></a>
<span class="sourceLineNo">027</span>        this.log.info("closing application context");<a name="line.27"></a>
<span class="sourceLineNo">028</span>        this.context.close();<a name="line.28"></a>
<span class="sourceLineNo">029</span>        this.context = null;<a name="line.29"></a>
<span class="sourceLineNo">030</span>    }<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span>    /**<a name="line.32"></a>
<span class="sourceLineNo">033</span>     * Get the classpath location of this instance's associated XML application context.<a name="line.33"></a>
<span class="sourceLineNo">034</span>     * The returned string will resolved on the classpath relative to this instance's class.<a name="line.34"></a>
<span class="sourceLineNo">035</span>     *<a name="line.35"></a>
<span class="sourceLineNo">036</span>     * &lt;p&gt;<a name="line.36"></a>
<span class="sourceLineNo">037</span>     * The implementation in {@link ContextMainClass} returns {@code getClass().getSimpleName() + ".xml"},<a name="line.37"></a>
<span class="sourceLineNo">038</span>     * which will locate an XML file in the same package and with the same name.<a name="line.38"></a>
<span class="sourceLineNo">039</span>     */<a name="line.39"></a>
<span class="sourceLineNo">040</span>    protected String getContextLocation() {<a name="line.40"></a>
<span class="sourceLineNo">041</span>        return getClass().getSimpleName() + ".xml";<a name="line.41"></a>
<span class="sourceLineNo">042</span>    }<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>    /**<a name="line.44"></a>
<span class="sourceLineNo">045</span>     * Autowire this instance using its associated application context.<a name="line.45"></a>
<span class="sourceLineNo">046</span>     * This may be invoked by {@link #runInContext} to autowire this bean using its associated context.<a name="line.46"></a>
<span class="sourceLineNo">047</span>     *<a name="line.47"></a>
<span class="sourceLineNo">048</span>     * &lt;p&gt;<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * For this to work, the application context must have autowiring enabled, e.g., via<a name="line.49"></a>
<span class="sourceLineNo">050</span>     * {@code &lt;context:annotation-config/&gt;}.<a name="line.50"></a>
<span class="sourceLineNo">051</span>     */<a name="line.51"></a>
<span class="sourceLineNo">052</span>    protected void autowire() {<a name="line.52"></a>
<span class="sourceLineNo">053</span>        this.log.info("autowiring instance of " + this.getClass() + " using " + this.context.getAutowireCapableBeanFactory());<a name="line.53"></a>
<span class="sourceLineNo">054</span>        this.context.getAutowireCapableBeanFactory().autowireBean(this);<a name="line.54"></a>
<span class="sourceLineNo">055</span>    }<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span>    @Override<a name="line.57"></a>
<span class="sourceLineNo">058</span>    public int run(final String[] args) throws Exception {<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span>        // Open context<a name="line.60"></a>
<span class="sourceLineNo">061</span>        openContext();<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span>        // Invoke subclass<a name="line.63"></a>
<span class="sourceLineNo">064</span>        try {<a name="line.64"></a>
<span class="sourceLineNo">065</span>            return this.runInContext(args);<a name="line.65"></a>
<span class="sourceLineNo">066</span>        } catch (Exception e) {<a name="line.66"></a>
<span class="sourceLineNo">067</span>            this.log.error("caught exception during execution", e);<a name="line.67"></a>
<span class="sourceLineNo">068</span>            throw e;<a name="line.68"></a>
<span class="sourceLineNo">069</span>        } finally {<a name="line.69"></a>
<span class="sourceLineNo">070</span>            closeContext();<a name="line.70"></a>
<span class="sourceLineNo">071</span>        }<a name="line.71"></a>
<span class="sourceLineNo">072</span>    }<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
<span class="sourceLineNo">074</span>    /**<a name="line.74"></a>
<span class="sourceLineNo">075</span>     * Execute the main method. The application context will be open when this method is invoked.<a name="line.75"></a>
<span class="sourceLineNo">076</span>     */<a name="line.76"></a>
<span class="sourceLineNo">077</span>    protected abstract int runInContext(String[] args) throws Exception;<a name="line.77"></a>
<span class="sourceLineNo">078</span>}<a name="line.78"></a>
<span class="sourceLineNo">079</span><a name="line.79"></a>




























































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